<template>
  <div class="component-upload-image">
    <el-upload
      multiple
      v-model:file-list="fileList"
      :action="uploadImgUrl"
      list-type="picture-card"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      ref="imageUpload"
      :on-remove="handleDelete"
      :show-file-list="true"
      :headers="headers"
      :on-preview="handlePictureCardPreview"
      :class="{hide: this.fileList.length >= this.limit}"
    >
      <el-icon
        v-if="
          !['mp4', 'WebM', 'MOV', 'QT', 'FLV', 'AVI'].includes(
            dialogImageUrl
              .substring(dialogImageUrl.lastIndexOf('/') + 1)
              .split('.')
              .pop()
              .toLowerCase()
          )
        "
        ><Plus
      /></el-icon>

      <video
        v-if="
          ['mp4', 'WebM', 'MOV', 'QT', 'FLV', 'AVI'].includes(
            dialogImageUrl
              .substring(dialogImageUrl.lastIndexOf('/') + 1)
              .split('.')
              .pop()
              .toLowerCase()
          )
        "
        width="100"
        height="500"
        controls
      >
        <source :src="dialogImageUrl" type="video/mp4" />
        Your browser does not support HTML5 video.
      </video>
    </el-upload>

    <!-- 上传提示 -->
    <div class="el-upload__tip" slot="tip" v-if="showTip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>

    <el-dialog v-model="dialogVisible" title="预览" width="800" append-to-body>
      <video
        v-if="
          ['mp4', 'WebM', 'MOV', 'QT', 'FLV', 'AVI'].includes(
            dialogImageUrl
              .substring(dialogImageUrl.lastIndexOf('/') + 1)
              .split('.')
              .pop()
              .toLowerCase()
          )
        "
        width="100%"
        height="500"
        controls
      >
        <source :src="dialogImageUrl" type="video/mp4" />
        Your browser does not support HTML5 video.
      </video>
      <img
        v-else
        :src="dialogImageUrl"
        style="display: block; max-width: 100%; margin: 0 auto"
      />
    </el-dialog>
  </div>
</template>

<script>
import {getToken} from "../../utils/auth";
import {h} from "vue";
import {ElNotification} from "element-plus";
export default {
  props: {
    value: [String, Object, Array],
    // 图片数量限制
    limit: {
      type: Number,
      default: 15,
    },
    ind: {
      type: Number,
      default: 0,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["png", "jpg", "jpeg"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true,
    },
  },
  data() {
    return {
      number: 0,
      uploadList: [],
      dialogImageUrl: "",
      dialogVisible: false,
      hideUpload: false,
      baseUrl: "http://150.158.34.172/ryl",
      uploadImgUrl: "http://150.158.34.172/ryl/common/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: [],
    };
  },

  created() {},

  watch: {
    value: {
      handler(val) {
        if (val) {
          console.log(val);
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(",");
          // 然后将数组转为对象数组
          this.fileList = list.map((item) => {
            if (typeof item === "string") {
              if (item.indexOf(this.baseUrl) === -1) {
                item = {name: this.baseUrl + item, url: item};

                // item = {name: this.baseUrl + item, url: this.baseUrl + item};
              } else {
                item = {name: item, url: item};
              }
            }
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true,
    },
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  methods: {
    // 上传前loading加载
    handleBeforeUpload(file) {
      let isImg = false;
      if (this.fileType.length) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        isImg = this.fileType.some((type) => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
        ElNotification({
          title: "提示",
          message: h("i", {style: "color: red"}, "文件格式不正确！"),
        });

        return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          ElNotification({
            title: "提示",
            message: h(
              "i",
              {style: "color: red"},
              `上传图片大小不能超过 ${this.fileSize} MB!`
            ),
          });

          return false;
        }
      }

      this.number++;
    },
    // 文件个数超出
    handleExceed() {
      ElNotification({
        title: "提示",
        message: h(
          "i",
          {style: "color: red"},
          `上传文件数量不能超过 ${this.limit} 个!`
        ),
      });
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      if (res.code === 200) {
        this.$emit("und", res);
        this.$emit("unsd", res);
        this.$emit("undv", res);
        this.uploadList.push({name: res.fileName, url: res.fileName});
        this.uploadedSuccessfully();
      } else {
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(res.msg);
        this.$refs.imageUpload.handleRemove(file);
        this.uploadedSuccessfully();
      }
    },
    // 删除图片
    handleDelete(file) {
      this.$emit("shan", file, this.ind);
      this.$emit("zshan", file);

      const findex = this.fileList
        // e.response ? e.response.url : e.url
        .map((f) => {
          return f.response ? f.response.newFileName : f.url;
        })
        .indexOf(file.response ? file.response.newFileName : file.url);
      if (findex > -1) {
        this.fileList.splice(findex, 1);
        this.$emit("input", this.listToString(this.fileList));
      }
    },
    // 上传失败
    handleUploadError() {
      ElNotification({
        title: "提示",
        message: h("i", {style: "color: red"}, `上传失败`),
      });
    },
    // 上传结束处理
    uploadedSuccessfully() {
      if (this.number > 0 && this.uploadList.length === this.number) {
        // this.fileList = this.fileList.concat(this.uploadList);

        console.log(this.fileList);
        this.uploadList = [];
        this.number = 0;
        ElNotification({
          title: "提示",
          message: h("i", {style: "color: teal"}, "上传成功！"),
        });
      }
    },
    // 预览
    handlePictureCardPreview(file) {
      console.log(file);
      this.dialogImageUrl = file.url;
      this.dialogVisible = true;
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        if (list[i].url) {
          strs += list[i].url.replace(this.baseUrl, "") + separator;
        }
      }
      return strs != "" ? strs.substr(0, strs.length - 1) : "";
    },
  },
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
  display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter,
.el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}
</style>
